Does anyone really think we are alone here on earth, there are a estimated (possible) 100 billion solar systems out there.
Is it naive of us to think that earth is the only one that got it right for life.

Does anyone really think we are alone here on earth, there are a estimated (possible) 100 billion solar systems out there.
Is it naive of us to think that earth is the only one that got it right for life.

Per current estimation of galaxies in the universe is 2 trillion (yes, trillion with a “T”) odds are that we are not alone.

What gives li_ion a 4.2v charge? Why is it not 6v or whatever random volt we need? Why 4.2v or 1.5 for alkaline and 1.2 for Nimh?

Think of a battery like a box of food. The V are the calories or “fat” each material (food) gives of a certain number of calories. li_ion is like a donut/pizza while the others are more like an apple. Also in a battery there are “cells” these cells are like lets say a dozen donuts in a box the donuts are the cells the box is the battery. For example in car batteries there are six cells with 2v that gives us a battery “box of donuts” of 12v. The V charge depends on the characteristics of the materials used.

On what type, kind, style(?) of flashlight do we need to feel it necessary to use protected cells?

I’d say that it’s necesssary to use protected cells in any light that uses cells in series, and it’s advisable to use protected cells in any single-cell light without low-voltage cutout, such as those that can take either AA or 14500 cells.

Should protected cells be used in lights that use multiple-cells in parallel?

On what type, kind, style(?) of flashlight do we need to feel it necessary to use protected cells?

I’d say that it’s necesssary to use protected cells in any light that uses cells in series, and it’s advisable to use protected cells in any single-cell light without low-voltage cutout, such as those that can take either AA or 14500 cells.

Should protected cells be used in lights that use multiple-cells in parallel?

If you could fire a laser in one direction of the cosmos and it didn’t disperse or hit anything that would absorb it, given enough time. would you see it coming from the opposite direction from where you sent it?

If you could fire a laser in one direction of the cosmos and it didn’t disperse or hit anything that would absorb it, given enough time. would you see it coming from the opposite direction from where you sent it?

Is there something like Moore’s law with LED emitters?
I’ve refreshed many old lights with newer emitters and the increased output is amazing.
Will I look back on today’s emitters 10 years from now and laugh at how weak they are or has this technology been nearly pushed to its limit?

Not asking for crystal ball answers, just wondering if anyone has deep knowledge of how far this can go.